THE MISSIONTHE MISSION

Offshore cruising, Survival up to sea state 9+Offshore cruising, Survival up to sea state 9+ Cutter-rigged sailing vesselCutter-rigged sailing vessel Classical aestheticsClassical aesthetics Crew of seven; Watch team of twoCrew of seven; Watch team of two Newest technology and systemsNewest technology and systems

Traditional style… Modern convenienceTraditional style… Modern convenience

Parametric AnalysisParametric Analysis

Based on Full Keel vessels of 38’- 50’ Based on Full Keel vessels of 38’- 50’ LWLLWL

39 vessels used:39 vessels used: 15 between 60’ and 70’ LOA15 between 60’ and 70’ LOA 9 between 45’ and 50’ LWL9 between 45’ and 50’ LWL

Parametric AnalysisParametric Analysis

Stormy Weather

Brilliant

Parametric AnalysisParametric AnalysisDisplacement to Length Ratio

100.00

150.00

200.00

250.00

300.00

350.00

400.00

450.00

30.00 35.00 40.00 45.00 50.00 55.00 60.00LWL (ft)

D/L

Parametric AnalysisParametric Analysis

Length to Beam

8.00

9.00

10.00

11.00

12.00

13.00

14.00

15.00

16.00

17.00

18.00

30.00 35.00 40.00 45.00 50.00 55.00 60.00 65.00 70.00

LWL (ft)

Bea

m (

ft)

Parametric AnalysisParametric Analysis

Displacement to Draft

5.005.506.006.507.007.508.008.509.009.50

10.00

10000 30000 50000 70000 90000 110000 130000Displacement

draf

t (ft)

Parametric AnalysisParametric Analysis

Sail Area to Displacement Ratio

0.00

5.00

10.00

15.00

20.00

25.00

30.00

15000 35000 55000 75000 95000 115000

Displacement (lb)

SA

/Dis

p

Principal DimensionsPrincipal Dimensions

Principal Dimensions and Ratios

LOA 62.5' L/Δ Ratio 264.69

LWL 46.25' SA 2186 ft2

Sailing WL 48.20' SA/ Δ Ratio 21.51

B 15' BHP 97 hp

T 8.3' Cp 0.59

Δ 71808 lb Cb 0.19

Cm 0.35

Cwp 0.64

Awp 444

PrincipalPrincipal DimensionsDimensions

Performance Estimation

    Capsize screening factor 1.45  (<2.0 is good)

         

    motion discomfort ratio 58.41  range 30-60

    overhang ratio 0.26  

    Waterplane loading Coefficient 161.73 lb/ft2

    hull speed est. 9.11 kt

    ballast ratio 27.85 %

HULL CHARACTERISTICSHULL CHARACTERISTICS

Graceful OverhangsGraceful Overhangs

Sharp EndsSharp Ends

Smooth sheer lineSmooth sheer line

Low profile good for seakeepingLow profile good for seakeeping

Lines/ Hull ModelLines/ Hull Model

Weights and CentersWeights and Centers

Full LoadFull Load

Total weight: 71,808.97 lbs Total weight: 71,808.97 lbs

32.06 LT 32.06 LT

LCG (aft of FP): 33.09 ftLCG (aft of FP): 33.09 ft TCG (+=stbd of CL): 0.009 ftTCG (+=stbd of CL): 0.009 ft VCG: 6.9 ftVCG: 6.9 ft

WeightsWeights andand CentersCenters

Light ShipLight Ship

Total weight: 65,571.2 lbs Total weight: 65,571.2 lbs

29.273 LT 29.273 LT

LCG (aft of FP): 40.17 ftLCG (aft of FP): 40.17 ft TCG (+=stbd of CL): 0.466 ftTCG (+=stbd of CL): 0.466 ft VCG: 6.9 ftVCG: 6.9 ft

RosamundaRosamunda WeightWeight CurveCurve

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

-55152535455565

Feet from FP (+ Aft)

Dis

trib

ute

d W

eig

ht

(LT

/ft)

Displacement =

LCG =

32.06

33.09

LT

ft aft FP

Intact StabilityIntact Stability Limit of Positive Stability: Limit of Positive Stability: 130 deg130 deg

Intact Righting Arm Curve

-2

-1

0

1

2

3

4

5

0 20 40 60 80 100 120 140 160

Degrees of Hee l

Rig

hti

ng

Arm

(ft

)

Based on GHS modelBased on GHS model

Outboard ProfileOutboard Profile

Inboard ProfileInboard Profile

Deck PlanDeck Plan

General ArrangementsGeneral Arrangements

Comfort at sea and in portComfort at sea and in port

Adequate sea berths Adequate sea berths

Good natural light and ventilationGood natural light and ventilation

FunctionalityFunctionality

General ArrangementsGeneral Arrangements

General ArrangementsGeneral Arrangements

Deck PlanDeck Plan

Goals are to provide the following:Goals are to provide the following: Ease of movement on deckEase of movement on deck SafetySafety Comfortable cockpit for both in port and at Comfortable cockpit for both in port and at

sea usesea use Good visibilityGood visibility Preserving the look and feel of a traditional Preserving the look and feel of a traditional

yachtyacht

Deck PlanDeck Plan

MODERN CONVENIENCE:MODERN CONVENIENCE: Self Tailing multi speed winchesSelf Tailing multi speed winches Cockpit led controlsCockpit led controls Travelers for main and staysailTravelers for main and staysail Easy opening low profile hatchesEasy opening low profile hatches Electronic displays for Navigation and Electronic displays for Navigation and

performanceperformance

STUCTURESSTUCTURES

BUILT To Lloyd’s BUILT To Lloyd’s Rules and Regulations Rules and Regulations for the Classification of Yachts (1979)for the Classification of Yachts (1979)

ISAF Special Regulations CATEGORY 1 ISAF Special Regulations CATEGORY 1 MonohullMonohull

STRUCTURESSTRUCTURES

RIG DESIGNRIG DESIGN

Fractional Cutter RigFractional Cutter Rig

Carbon Fiber Tapered Carbon Fiber Tapered SparSpar

Two Spreaders, no Two Spreaders, no running- back staysrunning- back stays

Double LowersDouble Lowers 1x19 wire shrouds1x19 wire shrouds

Rig DesignRig Design 78’ above DWL78’ above DWL

31’ Carbon/ Epoxy Boom w/ Spruce Veneer- finished 31’ Carbon/ Epoxy Boom w/ Spruce Veneer- finished brightbright

1122 ft1122 ft22 mainsail mainsail

Staysail= 380 ftStaysail= 380 ft2 2

Jib= 684ftJib= 684ft22

Total Sail Area= 2186 ftTotal Sail Area= 2186 ft2 2

SA/ Disp. Ratio= 21.51SA/ Disp. Ratio= 21.51

VELOCITY PREDICTION PROGRAMVELOCITY PREDICTION PROGRAM

PCSAIL 2.05PCSAIL 2.05

Based on Delft 93 seriesBased on Delft 93 series EXCEL-based Velocity Prediction ProgramEXCEL-based Velocity Prediction Program 5-speeds (6,9,12,16,20 kts)5-speeds (6,9,12,16,20 kts) 35 wind angles35 wind angles Calculates VMG, Apparent Boat Speed Calculates VMG, Apparent Boat Speed

and, Rand, RRR

SAIL POLARSSAIL POLARS

RESISTANCE CURVERESISTANCE CURVE

PROPULSION DETAILSPROPULSION DETAILS

Yanmar 4JH3-THE diesel engineYanmar 4JH3-THE diesel engine Four-stroke, vertical, water-cooledFour-stroke, vertical, water-cooled Rated for 97 BHP @ 3800 rpmRated for 97 BHP @ 3800 rpm ZF30M Mechanical Multi-plate clutchZF30M Mechanical Multi-plate clutch 563 lbs. in dry state563 lbs. in dry state Meets BSO II, SAV & EMC std. Meets BSO II, SAV & EMC std.

compliancecompliance

Propulsion DetailsPropulsion Details

ElectricalElectrical SystemSystem Generator: Onan 7 kWGenerator: Onan 7 kW

5 12V Sealed Marine Batteries5 12V Sealed Marine Batteries

110/220 V AC110/220 V AC 12V DC12V DC

Shore-power hookupShore-power hookup

Built-in Battery Charger/AlternatorBuilt-in Battery Charger/Alternator

                  

PipingPiping

Reverse Osmosis Fresh Water MakerReverse Osmosis Fresh Water Maker

2-175 gal potable water tanks2-175 gal potable water tanks

250 gal diesel fuel tank250 gal diesel fuel tank

2- 30 gal holding tanks2- 30 gal holding tanks

Automatic and Manual Bilge PumpsAutomatic and Manual Bilge Pumps

RudderRudder andand SteeringSteering

Steering Gear: Edson Steering Gear: Edson Robinson Worm Gear Robinson Worm Gear model #380-2model #380-2

2.5” Diameter Carbon 2.5” Diameter Carbon Rudder PostRudder Post

Rudder Data:Rudder Data: Area= 19.55 ftArea= 19.55 ft2 2

Center of Effort= 2.7’ Center of Effort= 2.7’ above BLabove BL

Design Load= 5046 lb Design Load= 5046 lb with FOS of 3with FOS of 3

FurtherFurther IterationsIterations Engine Side Access and Spacing too tight to be Engine Side Access and Spacing too tight to be

practical for maintenance practical for maintenance Correct ByCorrect By

• Increase Shaft AngleIncrease Shaft Angle• Raise Engine in HullRaise Engine in Hull• Move Engine Forward Move Engine Forward

Center of Effort- Lead too smallCenter of Effort- Lead too small Correct by:Correct by:

• Shifting Mast Forward one DiameterShifting Mast Forward one Diameter• Shifting Keel BackShifting Keel Back• Raising Jib Forestay Raising Jib Forestay

QUESTIONS?QUESTIONS?